Puerto Rico’s First CubeSat: Multidisciplinary Research Project to Attract STEM Students into the Area of Aerospace Systems

The purpose of this paper is to present an interdisciplinary research project using Cubesats to attract engineering students to the area of aerospace systems.

The EPS prototype is an example of how interdisciplinary research can aid the achievement of a common objective. The EPS was constructed based on the needs of the SPICA CubeSat established by the UIPR-Bayamon. The EPS is constructed on a 9cm x 9cm PCB, with a total weight of 0.071kg in order to comply with the CubeSat size and weight limitations. The constructed CubeSat EPS is shown in fig. 4. Fig. 5 illustrates the obtained output voltages of the CubeSats EPS.

The EPS prototype is built using an Arduino Uno microcontroller. The microcontroller is tasked with controlling the MPPT of the SEPIC as well as adjusting the duty cycle of the regulators accordingly. The EPS is also designed to provide regulation for both output voltages. Both regulators are designed using the SEPIC Topology. In order to test functionality the output voltages of the EPS where measured. Notice how the experimental results show that the EPS is able to regulate 5V and 3.3V at its respective outputs with little signal distortion. The 3.3V regulator reached a maximum voltage of 3.37V and a minimum voltage of 3.35V with a standard deviation of 0.0331V.

 

The 5V regulator reaches a maximum voltage of 5.10V and a minimum voltage of 4.99V with a standard deviation of 0.00714V. Both regulators are able to regulate voltage properly.